With these two next/previous keyboard shortcuts, you can quickly cycle through all your open Firefox tabs.

Jump to specific tabs

This next shortcut lets you use the number keys to jump to a specific Firefox tab:

Ctrl+[1-8]: On Windows, hold the Ctrl key and press any number key 1-8 to jump to the 1st, 2nd, 3rd … 8th tab.

Cmd+[1-8]: On a Mac, hold the Cmd key and press a number 1 through 8 to jump to a specific tab.

Ctrl/Cmd+9: Hold Ctrl (Windows) or Cmd (Mac) and press the 9 key to jump to the last tab.

This is one of my most-used keyboard shortcuts when reading new items in Google Reader — use the j/k Google shortcuts to browse through the recent headlines, hit “v” to open anything interesting in a new tab, then press Cmd+1 to jump back to the first tab which contains Google reader. When I have finished browsing all the new stories in Google Reader, anything that caught my interest is waiting in an open tab.